Induction heater for forging bar stock
US4075450A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 23, 1976 |
| Grant date | Feb 21, 1978 |
| Priority date | — |
| Expiry date | Feb 23, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B6/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An induction heating system for reheating the end of a forging bar after a previously heated section has been forged and cut off includes a mechanism for bringing the entire bar end to a uniform temperature despite the existence of a hot spot at the end from the previous heat. A pusher rod which limits the extension of the bar into the axial passage of the heating coil is initially positioned beyond the end of the coil from which the rod is inserted so that the residual hot spot extends beyond the coil end. After a predetermined time sufficient to bring the bar section within the coil up to the temperature of the residual hot spot the rod moves the bar end back into the coil. After the bar end reaches forging temperature the pusher rod ejects the bar from the coil. A pair of fluid cylinders in back-to-back relationship control the motion of the rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.